Harmonic damper

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A harmonic damper is a device connected to the free end of the crankshaft of an internal combustion engine. It is needed in engines with long crankshafts, such as straight-8 engines. It is used on most engines to reduce torsional vibrations that can occure at certain speeds.

Construction[change | edit source]

The damper consists of an inner hub attached to the end of the crankshaft. An round mass is attached to the hub by an elastic material. This become a spring-mass-damper system. By selection of the damping material and the size of the mass, the damper can be made to quiet the torsional vibrations. The overall appearance is that of a thick disk.